Bertrand Rouet-Leduc, Jean-Bernard Maillet, Christophe Denoual
A model for phase transitions initiated at nucleation sites on grain boundaries is proposed and tested against numerical simulations: a mean field approach allows to explicitly consider the granular structure, yielding accurate predictions for a wide span of nucleation processes. Comparisons are made with classical models of homogeneous as well as heterogeneous nucleation. While it is shown that the standard theory of homogeneous nucleation fails at predicting the nucleation kinetics from the interfaces, it is additionally shown that the accuracy of the usual model of heterogeneous nucleation diminishes as the nucleation rate increases, while that of the presented model is enhanced.
View original:
http://arxiv.org/abs/1301.7456
No comments:
Post a Comment